WO1999047887A1 - Detecteur d'angle de rotation - Google Patents

Detecteur d'angle de rotation Download PDF

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Publication number
WO1999047887A1
WO1999047887A1 PCT/JP1999/001281 JP9901281W WO9947887A1 WO 1999047887 A1 WO1999047887 A1 WO 1999047887A1 JP 9901281 W JP9901281 W JP 9901281W WO 9947887 A1 WO9947887 A1 WO 9947887A1
Authority
WO
WIPO (PCT)
Prior art keywords
mode
rotation angle
sensor
disk
steering
Prior art date
Application number
PCT/JP1999/001281
Other languages
English (en)
Japanese (ja)
Inventor
Makoto Inoue
Susumu Nishimoto
Norimitsu Kurihara
Masahide Ohnishi
Katsuya Saitou
Original Assignee
Matsushita Electric Industrial Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Industrial Co., Ltd. filed Critical Matsushita Electric Industrial Co., Ltd.
Priority to US09/423,999 priority Critical patent/US6380536B1/en
Priority to EP99907945A priority patent/EP0982564A4/fr
Publication of WO1999047887A1 publication Critical patent/WO1999047887A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D15/00—Steering not otherwise provided for
    • B62D15/02—Steering position indicators ; Steering position determination; Steering aids
    • B62D15/021—Determination of steering angle
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
    • G01D5/244—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing characteristics of pulses or pulse trains; generating pulses or pulse trains
    • G01D5/245—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing characteristics of pulses or pulse trains; generating pulses or pulse trains using a variable number of pulses in a train
    • G01D5/2454—Encoders incorporating incremental and absolute signals
    • G01D5/2455—Encoders incorporating incremental and absolute signals with incremental and absolute tracks on the same encoder
    • G01D5/2457—Incremental encoders having reference marks
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
    • G01D5/32—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light
    • G01D5/34—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
    • G01D5/244—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing characteristics of pulses or pulse trains; generating pulses or pulse trains
    • G01D5/24428—Error prevention
    • G01D5/24447—Error prevention by energy backup

Definitions

  • the present invention relates to a rotation angle detecting device for detecting a rotational position of a vehicle steering wheel.
  • the steering of a vehicle when the steering wheel is turned multiple times clockwise and counterclockwise (usually 3 to 6 times), the steering wheel is fully cut to the left and right and locks and locks. It is as follows.
  • a rotation angle detection device that detects the position and rotation angle of the steering has been proposed. That is, by using the same device, the driver can easily determine the traveling direction of the vehicle (particularly, whether or not the vehicle is going straight).
  • the system also includes various controls such as a device that changes the hardness of the suspension according to the angle of the steering, a device that alerts the driver when the steering is rotating beyond a certain angle, and a device that provides return guidance. It can also be applied to equipment.
  • Fig. 5 shows the configuration of a conventional rotation angle detection device.
  • reference numeral 1 denotes a disk having a first row of through holes 1a provided at a predetermined pitch and fixed to a rotor 2.
  • Reference numerals 3a and 3b denote first and second sensor elements, each of which is a transmissive photo-in board having a light-emitting element and a light-receiving element provided corresponding to the first through-hole row 1a. Two are installed side by side so that the direction of rotation can be detected.
  • the first sensor element 3a and the second sensor element 3b are provided at a predetermined angular pitch in advance.
  • the disc 1 further has a notch 1b for determining a reference position, and a third sensor element 4 composed of a transmission type photo-interconnect for detecting the notch 1b is provided.
  • the reference position for the rotation of the rotor 2 is detected by the missing portion 1 b and the third sensor element 4.
  • the mouth 2, the sensor elements 3 a and 3 b, and the sensor element 4 are housed in a case 5, and the roof 2 is configured to rotate freely in conjunction with the rotation of the steering of a vehicle or the like. ing.
  • the rotor 2 rotates in conjunction therewith, and the disk 1 fixed to the mouth 2 is rotated. It rotates, and the sensor elements 3 a and 3 b detect the number of through holes 1 a of the disk 1.
  • the through holes 1a are provided in advance with a predetermined angular pitch, and the first sensor element 3a and the second sensor element 3b are electrically arranged with a phase difference of 90 degrees.
  • the rotation of the rotor 2 and the disk 1 allows the reference position signal to be obtained when the missing portion lb passes through the sensor element 4, so that the amount of change in the steering rotation angle obtained as described above is eliminated.
  • the current rotation angle of the steering can be known. Therefore, by processing the number and phase of the rotation angle / rotation direction detection signals in an electronic circuit, the rotation angle and the rotation direction of the steering can be calculated. Then, the rotational position of the steering can be detected from the steering rotational angle and the rotational direction.
  • the present invention has been made in order to solve the above-mentioned problem.
  • the rotation angle and the rotation direction of the steering are backed up to a memory element of an electronic circuit by a memory, and the rotation is performed while the engine is stopped.
  • An object of the present invention is to provide a rotation angle detection device that can detect a rotation angle and a rotation direction of a steering even when an engine is stopped by operating a detection device itself by a sensor element in a standby state when a steering wheel is rotated. .
  • a rotation angle detecting device is directed to a disk having a plurality of through holes arranged at predetermined intervals in a circumferential direction and a cutout portion provided at a predetermined position in a circumferential direction.
  • First and second sensor elements including a light-emitting element and a light-receiving element disposed within a predetermined angle so as to correspond to the through-holes of the disk;
  • a third sensor element including a light-emitting element and a light-receiving element disposed therein; and a signal from the first, second, and third sensor elements.
  • a signal processing unit that outputs a detection signal in accordance with the rotation angle and the rotation direction of the disc; and a control unit that includes a storage unit that stores output from the signal processing unit when the main switch is turned on as position information,
  • First means for setting a dark current mode in which the sensor element is operable with a lower current consumption than a current consumption in a steady operation state, even though the main switch is in an off state;
  • a second means for providing a memory backup mode for supplying a current to the storage unit and maintaining a storage state of the position information from the signal processing unit even though the main switch is in an off state;
  • FIG. 1 (a) is a plan view of a rotation angle detecting device according to Embodiment 1 of the present invention.
  • FIG. 1 (b) is a sectional view of the same
  • FIG. 2 is an electric block diagram of the rotation angle detecting device
  • FIG. 4 is a timing chart of the output from the sub-element
  • FIG. 4 is an operation flow diagram showing a configuration of a main part of the rotation angle detection device
  • FIG. 5 is a plan view of a conventional rotation angle detection device.
  • FIG. 1 shows a rotation angle detecting device according to a first embodiment of the present invention.
  • FIG. 1 (a) is a plan view
  • FIG. 1 (b) is a sectional view
  • reference numeral 6 denotes an electronic circuit including a microcomputer (hereinafter abbreviated as a microcomputer) provided inside the rotation angle detecting device.
  • FIG. 2 is an electrical connection diagram of the rotation angle detecting device, including an ignition switch 7a as a main switch and an accessory switch 7b. Even if these switches 7a and 7b are cut, the main rotation is performed. Power is supplied to the angle detector directly from the battery.
  • Reference numeral 8 denotes control means for controlling the operation mode of the microcomputer itself and the sensor elements 3a, 3b, 4 between the normal mode and the current saving mode.
  • Reference numeral 9 denotes a mode switching unit that switches the sensor element between a normal mode and a power saving mode, and controls power supply to the optical light emitting / receiving unit.
  • the control means 8 includes a calculation unit 10 and a storage unit 11 for storing the absolute position of the angle.
  • the storage unit 11 is in a state in which the identification switch 7a and the accessory switch 7b are turned off (when the switch is off). However, the absolute angular position of the disc 1 is stored using the power supplied directly from the battery.
  • the calculation unit 10 calculates the amount of angular displacement, and based on the absolute steering angle information stored in the storage unit 11, Find new absolute angle, update information in storage unit 11 and output
  • the unit 12 outputs the angle information of the storage unit 11 as an electric signal
  • the control unit 13 controls the entire microcomputer.
  • Reference numeral 14 denotes a power supply circuit that converts a 12 V power supply from a battery into a 5 V power supply
  • 15 denotes a conversion circuit that converts a 12 V signal of the ignition switch 7 a into an input signal of a microcomputer.
  • Reference numeral 16 denotes a conversion circuit for converting the 12 V signal of the accessory switch 7b into a microcomputer input signal.
  • the sensor elements 3a, 3b, 4 include the light emitting elements 3La, 3Lb, 4L and the light receiving elements 3Pa, 3Pb, 4P.
  • FIG. 3 shows the output timing from the sensor element that appears with the change in the rotation angle
  • A, B, and Z show the outputs from the sensor elements 3a, 3b, and 4, respectively.
  • the state of H and L is switched every 1 degree of the rotation angle of the disc 1, and the sensor elements 3a and 3b are arranged so that the positions are shifted by 0.5 degree.
  • the sensor elements 3a, 3b, and 4 are arranged so that the signal switching point of Z coincides with the signal switching point of A.
  • FIG. 4 is an operation flow of a main part of the rotation angle detecting device.
  • the initial settings I / O ports of the microcomputer, various registers, RAM settings
  • step 10a 10b
  • step 10c Check the accessory position detection position of the main switch in step 10c.
  • the ignition switch is turned on, ie, when the engine starts or rotates, ) Operates and passes the sensor element in Step 10e. Operate in normal mode.
  • step 10f the phototransistor signal of the sensor element is checked and if it is off, the step
  • step 10f if the phototransistor signal of the sensor element is checked and turned on, the rotation direction is detected in step 10h, and the rotation speed is calculated in step 10k.
  • the rotation direction / number of rotations calculated as a result of the rotation direction detection at step 10h is stored in the storage unit at step 10m, and output to the outside at step 10n. After that, return to the state before checking the accessory position at step 10b.
  • the storage unit that is stored according to the instruction at Step 1 Om is the internal RAM unit of the microcomputer or the R ⁇ M (hereinafter referred to as EE ROM Alternatively, a storage element with a RAM (a lithium-ion battery) or a large-capacity capacitor for securing RAM and a power supply for the RAM outside the microcomputer can be used instead.
  • the routine described above indicates that the rotation angle and rotation direction of the handle while the engine is rotating operate in the normal power mode.
  • about 5 mA of current flows in the normal mode when the microcomputer wakes up in Step 1 Od, and the light emitting element for the sensor element in Step 10 e is about 6 mA.
  • a current of about A flows.
  • a current of approximately 17 to 18 mA flows, including the wake-up state of the microcomputer in step 1 Od and the operating state of the light emitting element for the sensor element in step 10 e.
  • step 10b or 10c the main switch is set to the off position of the accessory switch and the off position of the ignition switch. If it is, the operation is controlled based on a routine different from that described above.
  • steps 10b and 10c represent modes in which the battery power is not consumed when the engine is stopped, and if there is another signal that can be substituted, it can be substituted.
  • Step 10r To turn on the light emitting element for sensor element in the low current consumption mode.In step 10t, increase the gain so that the phototransistor for sensor element can operate in the low current consumption mode of the light emitting element for sensor element described above. To check the input status. If the input status is off, go to Step 1 Ou to set the microcomputer to sleep (memory backup) and return to Step 10b to check the accessory position.
  • step 10t As a result of checking the input state in which the gain of the phototransistor for the sensor element is increased in step 10t described above, when the input power is on, the state shifts to step 10d, and the steady operation mode Performs the detection of the rotation direction and rotation angle by the sensor element in one step.
  • the switch is determined to be in the off position, and when the door lock signal is turned on in step 10p and the handle lock signal is turned on in step 10q, a predetermined time determined by step 10s is set.
  • the light emitting element for the sensor element is turned off in step 10 V
  • the phototransistor for the sensor element is turned off in step 1 Ow
  • the microcomputer sleeve state is shifted in step 10 u.
  • the microcomputer sleep state in step 10u the memory backup state is maintained.
  • the engine is stopped, and at this time, a current of about 0.6 mA flows in the first high-current mode in the routine when the door lock signal and the handle lock signal are off.
  • a current of about 0.01 to 0.1 mA flows in the microcomputer sleep state.
  • the door lock signal and the handle lock signal are signals indicating a state in which the handle is not moved while the engine is stopped.
  • a signal indicating a driver's seat or a passenger seating state the range in which the steering wheel can be operated. Needless to say, this can be achieved by using a signal indicating that there is no person at the position).
  • a current of about 5 mA flows through the keyless receiver, but about 0.6 mA in the first dark current mode and about 0.1 mA in the second high current mode. Only a small amount of current flows, and this does not cause a major problem with battery power consumption when the engine is stopped.
  • a transmissive photointegrator is used as the sensor elements 3a, 3b, 4; however, a reflective photointegrator may be used.
  • a disc 1 having a hole 1a and a cutout 1b as a reflection portion is employed.
  • the present invention provides a disk having a plurality of through-holes arranged at predetermined intervals in the circumferential direction and a notch provided at a predetermined position in the circumferential direction.
  • First and second sensor elements including a light-emitting element and a light-receiving element disposed within a predetermined angle so as to correspond to the through-holes of the disk, and corresponding to the missing portion of the disk.
  • a third sensor element including a light emitting element and a light receiving element disposed therein, and a detection signal according to a rotation angle and a rotation direction of the disk using signals from the first, second, and third sensor elements.
  • a control unit including a storage unit that stores, as position information, an output from the signal processing unit when the main switch is turned on, the control unit comprising: Nevertheless, the first means for setting the current mode to maintain the sensor element operable with a lower current consumption than the current consumption in a steady operation state, and the main switch being in the off state , A second unit for supplying a current to the storage unit to set a memory backup mode for retaining a storage state of the position information from the signal processing unit; and a disk unit using the sensor element in the dark current mode by the first unit.
  • the memory backup mode is released so that the sensor element and the control means are operated in a steady operation state, and the ⁇ current mode is released.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Length Measuring Devices With Unspecified Measuring Means (AREA)
  • Length Measuring Devices By Optical Means (AREA)
  • Indicating Or Recording The Presence, Absence, Or Direction Of Movement (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)
  • Optical Transform (AREA)

Abstract

L'invention concerne un détecteur d'angle de rotation capable de détecter et de stocker des informations concernant un sens de rotation/angle de rotation de direction au cours d'un arrêt de moteur, et dont la consommation de courant de batterie est réduite. Le détecteur comporte un moyen (8) de commande comprenant une unité (11) de mémoire qui reste dans un état de sauvegarde de mémoire lorsqu'un contacteur (7a) d'allumage servant de contacteur principal est coupé; un mode d'alimentation électrique d'éléments (3a, 3b, 4) de capteur est enclenché par un signal de commande provenant du moyen (8) de commande de façon à assurer une consommation d'énergie inférieure à une consommation normale; un état de signal de sortie provenant d'au moins un des éléments (3a, 3b) de capteur est confirmé par le moyen (8) de commande lorsqu'un braquage est effectué, de façon à permettre aux éléments (3a, 3b, 4) de capteur mentionnés précédemment de fonctionner selon un mode normal, et un angle de rotation/sens de rotation peut être détecté à partir des informations de rotation de direction.
PCT/JP1999/001281 1998-03-17 1999-03-16 Detecteur d'angle de rotation WO1999047887A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US09/423,999 US6380536B1 (en) 1998-03-17 1999-03-16 Rotation angle detector for detecting a rotational position of a steering wheel of a vehicle
EP99907945A EP0982564A4 (fr) 1998-03-17 1999-03-16 Detecteur d'angle de rotation

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP10/66610 1998-03-17
JP06661098A JP3783393B2 (ja) 1998-03-17 1998-03-17 回転角度検出装置

Publications (1)

Publication Number Publication Date
WO1999047887A1 true WO1999047887A1 (fr) 1999-09-23

Family

ID=13320853

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP1999/001281 WO1999047887A1 (fr) 1998-03-17 1999-03-16 Detecteur d'angle de rotation

Country Status (4)

Country Link
US (1) US6380536B1 (fr)
EP (1) EP0982564A4 (fr)
JP (1) JP3783393B2 (fr)
WO (1) WO1999047887A1 (fr)

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CN110701983A (zh) * 2019-11-19 2020-01-17 中国兵器装备集团自动化研究所 一种同转轴多角度测量范围可变的转动角度测量装置

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US8164327B2 (en) * 2007-08-22 2012-04-24 Kostal Of America Steering angle sensor
EP2037221B1 (fr) * 2007-09-13 2019-04-03 Marquardt GmbH Serrure de contact pour un véhicule automobile
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JP5626702B2 (ja) * 2010-11-10 2014-11-19 日本精工株式会社 電動パワーステアリング装置
WO2016116566A1 (fr) * 2015-01-21 2016-07-28 Sanofi-Aventis Deutschland Gmbh Dispositif supplémentaire pour fixation à un stylo-injecteur et détermination d'une quantité de dose définie au moyen d'un codeur incrémentiel optique
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Publication number Priority date Publication date Assignee Title
CN110701983A (zh) * 2019-11-19 2020-01-17 中国兵器装备集团自动化研究所 一种同转轴多角度测量范围可变的转动角度测量装置

Also Published As

Publication number Publication date
US6380536B1 (en) 2002-04-30
EP0982564A4 (fr) 2008-06-11
JP3783393B2 (ja) 2006-06-07
EP0982564A1 (fr) 2000-03-01
JPH11264725A (ja) 1999-09-28

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